PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
SIGX Internal Registers 01-18H: SIGNALLING Data
Bit
Type
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
Unused
Unused
Unused
R
R
R
R
A
B
C
D
When the SIGNALLING Data registers are read, the byte returned contains the 4
signalling bits in the 4 least significant bit positions. If SF or SLC®96 framing
format is selected then C=A and D=B. The bits read correspond to the signalling
state extracted from the third to last superframe received.
When reading the extracted signalling data for a channel with signalling state
debounce enabled, the signalling data returned is the debounced version,
meaning that the signalling state value for that channel must have been the
same for two consecutive superframes before it was allowed to propagate
through the signalling buffers and be visible in the signalling data registers. If the
state was not the same, the current state (accessible via these registers) is not
changed.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
158
PMC [ PMC-SIERRA, INC ]
